code: def step_join(self, inputs):
      import os
  
      if current.retry_count == 2:
          self.test_attempt = inputs[0].test_attempt
      else:
          raise TestRetry()
  
file_path: metaflow/test/core/tests/tag_catch.py
imports: from metaflow_test import MetaflowTest, ExpectationFailed, steps, tag
  from metaflow import current
label_desc: Use image node_id 3 for calling the TagCatchTest obj's underlying member method code with example usage: obj.step_join(inputs) without return types